Process of producing a sulfur compound of quinin.



. napht produce a sulfur compound of quinin, a ter- UNITED STATES. PATENT OFFICE. I

MANY; ALFRI JD VICTOR RICHTER, ADMINISTRATOR, ASSIG-NOR TO THE FIRM F VALENTINER AND SGHWARZ, ,OF LEIPZIG-PLAGWITZ, GERMANY. a

' SAMUEL YALENTINER, late. a subject of the oint of the amin; with ,8 dinaphthylamin or instance to 250 0., which is about 7 5.

' conditions, carbon is formed. Only by alter- ..not take place at all.

- must be assumed that the modified process of sulfurizin tion, and t at probably one of the two oxygen atoms of t i of mineral acids oily particles of hydrogen hyper-sulfid were-separated. It has now zig', Germany, the administrator of lwhose estate is ALFRED VICTOR RICHTER, a subject:

Lei zig, Germany, has invented a new and dncing Su fur Compounds of Quinin, of which the following s a specification.

diamins b fusing sulfur with 'amin thepresence o sulfureted hydrogenhas invari- -.clwn Gesellschaft, VIII year, 1875, page products of heat, sulfur is introduced'into the quinin molecule when sulfur is'fused with the base at a temperature considerably below the heated toabout142? C. to'1 50 0., in a re' rnocnss or-rnonucme A SULFUR comronnn or comm.

80 Drawing.

To all whom it may concern:

Be it known that FREDERICK WILHELM Emperorof Germany and residing at Leipof the Emperor of Germany; residing at' use 111 Im roveme'nt in Processes of Pro- In the process at present practiced of sulfurizing prlmary .and. secondary amins and ably been observed and it was necessary to raise the temperature far above the fusion C.- higlherthan the fusion point of the di ylamin. However, with attempts to tiary amin under observance of the above tamed,-in which case it is observed-that then the generation of sulfureted hydrogen does In consequence it is different from the usual' a'ce quinin is replaced by sulfur. In a' y case the course of the reaction was not oils that could'be foreseen. 'Further, the unsuccessful attempts of E. Schmidt. (Berichte der Deutscizcnflhemi- 1274:) to sulfurize quinin and cinchonm by means of sulfureted hydro en in'an alcohol. solution ma "be instanc'e l; the resultant hmidtsprocess consisted of a mixture of distinct substances. By addition been found. that by the simple action of fusion point "of the latter.

The process of btaimng aJnonothio com ound 1s as follows 100' grams of an anhyrous quinin base are thorou hly pulverized I with about 20 grams of sulfur and slowly Specification of Letters Patent. Patented Mar, 29, 1910, l, i Application filed May 15, 1909. Serial No. 496,331.

' tort placed within an oil bath. With continuous stirring the mixture begins to clot and softens slightly at about 120 C. If the temperature ismaintained at 45 C.,

during about half an hour, a powder of a gray-brown color is obtained which after;

- cooling may readily be shaken out of the retort. The fine powder-like substance is then dissolved in an a ueous" solution'of hydroch'loric acid, partic es containing carbon as also any free sulfur being removed by filtration. Thebase contained in the filtrate is precipitated with the aid of ammonia, is

recovered'in theu'sual manner and isthen' purified by resolution. The new ii uinin base is ofa yellow color, contains sul ur (silver test), and changes to a brown color with incrustation at 120 0.,-

The product obtained'in the manner above.

described is 'a free'thio base of'quinin and is more particularly characterized by reference to its solubility in organic solutions.

The free thio base of quinin is partly soluble in cold or warm alcohol-ether, insoluble in ether; readily soluble in alcohol, slightly soluble in coldand hot benzol, fuses when heated, is soluble with difliculty in cold or hot chloroform, and slightly soluble in acetone. 1

Analysis has iven the following values for the S- and contents 1. For the S- contents.

Per cent.

20 Giving an avers. e'of 8.46% .N. Calcu- Substance. 195.90 Per cent. 01. 2.2520 13.8765 2.1120 18 ;77 5

Giving an avers e of 9.50% S. Calculated for (l H N O 9.41% S. w

2. -For the N contents.

lated for C I-I N O 8.24% N,

The ,free thio compound of quinin produces, in combination with inorganic and or anic. acids, salts which crystallize with d' culty, and is intended to'be used in the arts of pharmac and cosmetics. Having described the invention what is below. the fusion 1 The process of producing a sulfureted compound of quinin of the general formula C H NQOS consisting in fusing sulfur with the. free base at a temperature considerably point of the latter, as described.

is replaced by sul ur, browircolor with incrustation at 120 C. and fuses at 135 C., forming a transparent dark brown mass, said compound being partly soluble in cold or Warm alcohol-ether,

clainied and desired to secure by Letters I Patent of the United States is insoluble in ether, readily soluble inalcohol,

and slightly soluble in acetone.

In testimony whereof I have signed my name to this specification in the presence of two subscriblng witnesses.

ALFRED VICTOR RICHTER,

Admintstmtoe' of the estate of Frederick Wilhelm Samuel Valentiner, deceased. Witnesses:

HEINRICH GOUTENT, RUDOLPH M. FRICKE.

. 35 com ound of .quinin and sulfur in which one o the oxygen atoms of the quinin which changes to a 

